make generateEphemerides flexible over observatories

Author: Gerenjie

data/eph.ini

@@ -59,7 +59,7 @@ fill_factor = 1.0
 
 # Radius of the circle for a circular footprint (in degrees). Float.
 # Comment out or do not include if using footprint camera model.
-circle_radius = 2
+circle_radius = {FOV}
 
 
 [FADINGFUNCTION]
@@ -81,7 +81,7 @@ fading_function_peak_efficiency = 1.
 # Configuration for running the ASSIST+REBOUND ephemerides generator.
 
 # the field of view of our search field, in degrees
-ar_ang_fov = 2.06
+ar_ang_fov = {FOV}
 
 # the buffer zone around the field of view we want to include, in degrees
 ar_fov_buffer = 0.2
@@ -92,7 +92,7 @@ ar_fov_buffer = 0.2
 ar_picket = 1
 
 # the obscode is the MPC observatory code for the provided telescope.
-ar_obs_code = X05
+ar_obs_code = {OBSCODE}
 
 # the order of healpix which we will use for the healpy portions of the code.
 # the nside is equivalent to 2**ar_healpix_order

python/lsst/pipe/tasks/generateEphemerides.py

@@ -148,12 +148,17 @@ class GenerateEphemeridesConnections(PipelineTaskConnections,
 class GenerateEphemeridesConfig(
         PipelineTaskConfig,
         pipelineConnections=GenerateEphemeridesConnections):
-    observerCode = pexConfig.Field(
+    observatoryCode = pexConfig.Field(
         dtype=str,
         doc="IAU Minor Planet Center observer code for queries "
             "(default is X05 for Rubin Obs./LSST)",
         default='X05'
     )
+    observatoryFOVRadius = pexConfig.Field(
+        dtype=float,
+        doc="The field of view of the observatory (degrees)",
+        default=2.06,
+    )
 
 
 class GenerateEphemeridesTask(PipelineTask):
@@ -264,8 +269,11 @@ def run(self, visitSummaries, mpcorb, de440s, sb441_n16, obsCodes, linux_p1550p2
         inputColors = inputOrbits[["ObjID"]].copy()
         inputColors["H_r"] = mpcorb['h']
         inputColors["GS"] = 0.15 # Traditional
+
         eph_str = resources.files(lsst.pipe.tasks).parents[3].joinpath("data/eph.ini").read_text()
-        # same as code
+        eph_str = eph_str.replace("{OBSCODE}", self.config.observatoryCode)
+        eph_str = eph_str.replace("{FOV}", str(self.config.observatoryFOVRadius))
+
         with tempfile.TemporaryDirectory() as tmpdirname:
             self.log.info(f'temp dir: {tmpdirname}')